Loom frog



March 15, 1927- v|s LOOM FROG Filed Oct. 2, 1926 2 Sheets-Sheet 1 ATTORNEY March 15, 1927.

H. A. DAVIS LOOM FROG Filed Oct. 2, 1926 12 Sheets-Sheet 2 AfroR/VEY the elastic material to be utilized to arrest frontward movement of the frog, a condition which is essential in protector mechanisms because if the frog were not arrested before the lay completes its front movement, the lay wouldcontinue' frontwardly, with the result that the shuttle, trapped in the shed,

"would break out the warp threads.

The;frog 20 has its portion rearward of the rear wall 22 slotted, as at 24, thus forming at each side of the slot 24 guide members 25 connected to the body of the frog by the inclined walls '26, thereby imparting strength and stability to the frog under the lifting action that is liable to occur when the loom bangs-0H,

Secured to the'loom framerrearward of the frog is the frog stop and guide 27'Wl1iCl1 may be appropriately held in fixed position by means of a bolt 28. The frontwardly extending portion 29 of the frog stop and guide overlies the guide members 25 projecting rearwardly from the frog, and the frog guide and stop has at its front a stop portion 30, which, when the frog is moved rearwardly by the block of elastic material so, rests against the back surface of the frog back wall 22; The frog stop and guide is thus constructed to not only guide the frog in its frontward and rearward movements, but effectively prevent, any lifting action of the rear end portion of the frog when the loom bangs oif.

Under ordinary working conditions, the block of elastic material 23, such as rubber or the like, will be suflicient'to act through {its entire cross-sectional dimensions to arrest from the frog.

frontward movement of the. frog before the lay completes its frontward movement, and will by its bodily elastic character return the frogvto itsrea-rward position when the lay. is moved back or the dagger released It may happen at times that the block of elastic material or rubber 23 may fail to effectively perform its arresting function and, in'accordance'with the present invention, a safety-pin 13 provided to insure stoppage of the frog before the lay completes its frontward movement.

Inthe present instance of the invention the frog 20 is provided'with the side meme bers 31 which embrace the side portions of the frog support 15 and extending between the lugs 31 is a safety bolt 32 which passes throughthe elongated slot 19 in the frog 32 is non-circular in cross-section and at each end thereof it is provided with a circu lar cross-sectional portion 33 which engages corresponding openings 34 in the frog lugs 31. The safety pin may appropriately be held in its operative position in the slot 19 and connected to the frog by means of the cotter pins 35, as indicated in Fig. 2, al though any appropriate means may beprovided for this purpose. i

As hereinbefore stated, the safety pin 32 is of non-circular cross-section and such portion of the safety pin is contained. within the elongated slot 19 of the frogsupport,. so that as the frog. is moved frontwardly, the safety pin partakes of such movement and at a predetermined point of its frontward travel, the safety pin is met by a stop which effectively prevents further frontward movement of the frog. In-the present instance of the invention, the safety pin stop consists of a cushioning material 36 mounted in the front portion of the elongated slot 19, and in order that such cushioning material may not yield sufficiently topermit the frog tomove frontwardly, it is made less yielding-than the block of elastic .niaterial 23, with the result that should the block of elastic material 23 permit the frog to move frontwardly to bring the safety pin 32 against the stop'36, the latter will act to v effectively stop any further frontward move- 7 ment of the frog. In the present instance of the invention, the safety pin stop 36 may be formed of leather, which, while having some yield, is less elastic than the elastic material or rubber block 23. It is desirable that the safety pin stop 36 bemade slightly yielding, because the full momentum of the lay may be exerted against such material and its slight elasticity will prevent breal age of parts. v

The safety pin 32 has its active portionof non-circular cross-section, as above noted, and this is desirable because it will not indent orbecome embedded in the cushioned and the frog stop and guide which overlies the rear end portion of the frog will act to permit frontward and rearward movement of the frog while restraining any lifting at lOG .llU

the rear end thereof. The safety pin 32, as will be readily apparent, is passed through the slot 19 of the frog support and its cir-} cular end portions are mounted in lugs 31 of the frog. In order to facilitate assembly, one of the openings 34 in the frog lugs 31 is made somewhat larger than the other, as 7 1s a good practical construction, but ob-' viously various detailed constructions may be employed within the true scope of theinvention.

VVhat is claimed is:

l. A protector mechanism for looms, comprising a frog support, a recessed frog having an openv bottom and back wall and slidably mounted upon the frog support, a frog stop and guidesecured to the loom frame and overlying portions of the frog, a fixed thrust wall within the recess of the frog, and a block of rubber material coextensive with the space between the thrust wall-and back wall of the frog when the latter is in its rearward position that the full section of such material may be effective in cushioning the frontward movement of the frog, a safety pin carried by the frog, and an elastic stop of less elasticity than the block of rubber material tostop the frog before the lay completes its frontward movement. v

2. A protector mechanism for looms, com.- prising a frog support, a recessed frog havin an open bottom and back wall and slidably mounted on the frog support. a thrust wall mounted on the support within the recessed frog, a block of rubber substantially filling the space between the'thrust wall and back, wall of the frog that the full section thereof may be effective in cushioningthe frontward movement of the frog, a safety pin carried by the frog, anda stopv in the f path of the safety *pin for arresting front- Ward movement of the frog prior to the full frontward movement of the lay.

3. Aprotector mechanism for looms, co1nprising a frog support, a recessed frog having an open bottom andrear wall and mounted on the support, a frog stop and guide acting upon the rear portion of the frog to 1 confine it to movements towards and from the front of the loom, a'fixed thrust wall within the recess of the frog, a block ofelastic material substantially filling the recess of the frog back of the thrust wall for engagementby the rear wall ofthefrog that the full sectionof. said material maybe effective to arrest frontward movement of the frog, :1 safety pin having a stop surface of non-circular cross-section and secured to the frog," and a stop less yielding than the said arrest of the frog prior to the full beat-up movement of the lay should the block of elastic material fail to do so. i

' 4. A protector mechanism for looms, comprising a frog support, a recessed frog having an open bottom and a back, a frog stop and guide acting upon the rear portion of the frog to confine it to movements towards and from the front of the loom, a fixed thrust wall within the recess of the frog, a yielding cushion within the recess of the frog back of the thrust wall, a safety pin having a stop portion of non-circular cross-section andsecured to the frog, and a stop less a 85 In testimony whereof, have sign edimy name to this specification. V HARRY A. DAVIS.

before the lay com:

elastic material for engagement by the noncircular portionof the safety pin to insure 7 

